Wherefore, the contriver of a plot ought never, if he can help it, to communicate his design until the moment when it is to be executed; or if he must communicate it, then to some one man only, with whom he has long been intimate, and whom he knows to be moved by the same feelings as himself. To find one such person is far easier than to find several, and, at the same time, involves less risk; for though this one man play you false, you are not left altogether without resource, as you are when your accomplices are numerous. For I have heard it shrewdly said that to one man you may impart anything, since, unless you have been led to commit yourself by writing, your denial will go as far as his assertion. Shun writing, therefore, as you would a rock, for there is nothing so damning as a letter under your own hand.
Plautianus, desiring to procure the deaths of the Emperor Severus and his son Caracalla, entrusted the business to the tribune Saturninus, who, being more disposed to betray than obey Plautianus, but at the same time afraid that, if it came to laying a charge, Plautianus might be believed sooner than he, asked him for a written authority, that his commission might be credited. Blinded by ambition, Plautianus complied, and forthwith was accused by Saturninus and found guilty; whereas, but for that written warrant, together with other corroborating proofs, he must have escaped by his bold denial of the charge. Against the testimony of a single witness, you have thus some defence, unless convicted by your own handwriting, or by other circumstantial proof against which you must guard. A woman, named Epicharis, who had formerly been a mistress of Nero, was privy to Piso’s conspiracy, and thinking it might be useful to have the help of a certain captain of triremes whom Nero had among his bodyguards, she acquainted him with the plot, but not with the names of the plotters. This fellow, turning traitor, and accusing Epicharis to Nero, so stoutly did she deny the charge, that Nero, confounded by her effrontery, let her go.
In imparting a plot to a single person there are, therefore, two risks: one, that he may come forward of his own accord to accuse you; the other, that if arrested on suspicion, or on some proof of his guilt, he may, on being convicted, in the hope to escape punishment, betray you. But in neither of these dangers are you left without a defence; since you may meet the one by ascribing the charge to the malice of your accuser, and the other by alleging that the witness his been forced by torture to say what is untrue. The wisest course, however, is to impart your design to none, but to act like those who have been mentioned above; or if you impart it, then to one only: for although even in this course there be a certain degree of danger, it is far less than when many are admitted to your confidence.
A case nearly resembling that just now noticed, is where an emergency, so urgent as to leave you no time to provide otherwise for your safety, constrains you to do to a prince what you see him minded to do to you. A necessity of this sort leads almost always to the end desired, as two instances may suffice to show. Among the closest friends and intimates of the Emperor Commodus, were two captains of the pretorian guards, Letus and Electus, while among the most favoured of his mistresses was a certain Martia. But because these three often reproved him for his manner of living, as disgraceful to himself and to his station, he resolved to rid himself of them; and so wrote their names, along with those of certain others whom he meant should be put to death the next night, in a list which he placed under the pillow of his bed. But on his going to bathe, a boy, who was a favourite of his, while playing about his room and on his bed, found the list, and coming out of the chamber with it in his hand, was met by Martia, who took it from him, and on reading it and finding what it contained, sent for Letus and Electus. And all three recognizing the danger in which they stood, resolved to be beforehand with the tyrant, and losing no time, murdered him that very night.
The Emperor Caracalla, being with his armies in Mesopotamia, had with him Macrinus, who was more of a statesman than a soldier, as his prefect. But because princes who are not themselves good are always afraid lest others treat them as they deserve, Caracalla wrote to his friend Maternianus in Rome to learn from the astrologers whether any man had ambitious designs upon the empire, and to send him word. Maternianus, accordingly, wrote back that such designs were entertained by Macrinus. But this letter, ere it reached the emperor, fell into the hands of Macrinus, who, seeing when he read it that he must either put Caracalla to death before further letters arrived from Rome, or else die himself, committed the business to a centurion, named Martialis, whom he trusted, and whose brother had been slain by Caracalla a few days before, who succeeded in killing the emperor.
We see, therefore, that an urgency which leaves no room for delay has almost the same results as the method already noticed as followed
